GENERATION OF RADIATION ON MULTIPLE FREQUENCIES IN GAZES AT PLASMA EXCITATION BY A STRONG FIELD OF FEW-CYCLE PULSES

S. A. Kozlov, A. . Korolev, S. . Shtumpf


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Abstract

 

High-frequency radiation generation at neon optical breakdown  by femtosecond few-cycle pulses is considered. It is shown that as the number of oscillations per pulse decreases up to just one, a shift of multiple harmonics to shorter wavelengths grows. The plasma dielectric nonlinearity leads to amplified redistribution of radiation energy to shorter wavelengths.


Keywords: few-cycle pulses, plasma nonlinearity, multiple harmonics generation.
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